dockerfiles/mastodon

wonderfall/mastodon

A GNU Social-compatible microblogging server : https://github.com/tootsuite/mastodon

Why this image?

This image is not the official one. The main difference you can notice is that all processes (web, streaming, sidekiq) are running in a single container, thanks to s6 (a supervision suite). Therefore it's easier to deploy, but not recommended for scaling on more than one machine.

Features

• Based on Alpine Linux 3.6.
• As lightweight as possible.
• All-in-one container (s6).
• Assets are precompiled.
• Database migrations can be run at startup.
• No root processes.

Docker Hub tags

• master : latest code for adventurers (builds daily on Docker Hub)
• stable : latest stable version (builds weekly on Docker Hub)
• targaryen : Targaryen-themed stable version (builds weekly on Docker Hub)

Build-time variables

• VERSION : version of Mastodon, can be v1.4.1 or master. (default : master)
• REPOSITORY : location of the code (default : tootsuite/mastodon)

Environment variables you should change

• UID : mastodon user id (default : 991)
• GID : mastodon group id (default : 991)
• RUN_DB_MIGRATIONS : run rake db:migrate at startup (default : true)
• SIDEKIQ_WORKERS : number of Sidekiq workers (default : 5)
• Other environment variables : https://github.com/tootsuite/mastodon/blob/master/.env.production.sample

Volumes

• /mastodon/public/system : shit like media attachments, avatars, etc.
• /mastodon/public/assets : Mastodon assets
• /mastodon/public/packs : Mastodon assets
• /mastodon/log : Mastodon logfiles (mount if you prefer to)

Ports

• 3000 : Mastodon web
• 4000 : Mastodon streaming

docker-compose sample

mastodon:
  image: wonderfall/mastodon:stable
  restart: always
  container_name: mastodon
  env_file: /home/docker/mastodon/.env.production
  environment:
    - WEB_CONCURRENCY=16
    - MAX_THREADS=20
    - SIDEKIQ_WORKERS=25
    - RUN_DB_MIGRATIONS=true
  links:
    - mastodon-pgb
    - mastodon-redis
  volumes:
    - /home/docker/mastodon/public/system:/mastodon/public/system
    - /home/docker/mastodon/public/assets:/mastodon/public/assets
    - /home/docker/mastodon/public/packs:/mastodon/public/packs